ced9d72d94
Prefer use of source-engine for DMA copies, even if user submits copy in a stream attached to a different device. The stream is now used only for synchronization, and HIP makes the most optimal decision for which engine to perform the copy - typically the source copy engine. HIP now makes decision on which engine should perform the copy and passes this to HCC using new apis. HIP has additional information about peer visibility and will make a decision which agent should perform the copy . Change-Id: I0cf4cfebeae256e6ca795f08a7ed7130f4857d1f